Lines Matching +full:buffer +full:- +full:size

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O
35 or :ref:`user pointer <userp>` or :ref:`DMA buffer <dmabuf>` I/O. It
53 ``type`` field the requested buffer size (for single-planar) or plane
54 sizes (for multi-planar formats) will be used for the allocated buffers.
55 The driver may return an error if the size(s) are not supported by the
58 The buffers created by this ioctl will have as minimum size the size
63 it is larger, then the value will be used as-is. In other words, the
64 driver may reject the requested size, but if it is accepted the driver
77 .. flat-table:: struct v4l2_create_buffers
78     :header-rows:  0
79     :stub-columns: 0
82     * - __u32
83       - ``index``
84       - The starting buffer index, returned by the driver.
85     * - __u32
86       - ``count``
87       - The number of buffers requested or granted. If count == 0, then
90 	``format.type``. If those are invalid -1 is returned and errno is
94     * - __u32
95       - ``memory``
96       - Applications set this field to ``V4L2_MEMORY_MMAP``,
99     * - struct :c:type:`v4l2_format`
100       - ``format``
101       - Filled in by the application, preserved by the driver.
102     * - __u32
103       - ``capabilities``
104       - Set by the driver. If 0, then the driver doesn't support
108 	capabilities. See :ref:`here <v4l2-buf-capabilities>` for a list of the
113 	``V4L2_MEMORY_MMAP`` and ``format.type`` to the buffer type.
115     * - __u32
116       - ``flags``
117       - Specifies additional buffer management attributes.
118 	See :ref:`memory-flags`.
119     * - __u32
120       - ``max_num_buffers``
121       - If the V4L2_BUF_CAP_SUPPORTS_MAX_NUM_BUFFERS capability flag is set
124     * - __u32
125       - ``reserved``\ [5]
126       - A place holder for future extensions. Drivers and applications
132 On success 0 is returned, on error -1 and the ``errno`` variable is set
134 :ref:`Generic Error Codes <gen-errors>` chapter.
140     The buffer type (``format.type`` field), requested I/O method